1.

1. (a) Any city to which the multiple dwelling law is applicable, acting through its local legislative body or other governing agency, is hereby authorized and empowered, to and including January first, two thousand nineteen, to adopt and amend local laws or ordinances providing that any increase in assessed valuation of real property shall be exempt from taxation for local purposes, as provided herein, to the extent such increase results from:

   1. (1) conversion of buildings or structures on such property to class A multiple dwellings not used in whole or in part for single room occupancy, including conversion of residential units qualified for the protection of article seven-C of the multiple dwelling law in buildings classified as interim multiple dwellings pursuant to such article to units which are in compliance with the standards of safety and fire protection set forth in article seven-B of the multiple dwelling law or to units which have a certificate of occupancy as class A multiple dwellings; or
   2. (2) alterations or improvements, including as improvements asbestos abatement to the extent such asbestos abatement is required by federal, state or local law, on such property to eliminate unhealthy or dangerous conditions or to replace inadequate and obsolete sanitary facilities, any of which represent fire or health hazards, in any existing class A multiple dwellings or buildings consisting of one or two dwelling units over space used for commercial occupancy, except insofar as the gross cubic content of the building is increased thereby; or
   3. (3) alterations or improvements on such property which are designed to conserve the use of fuel, electricity or other such energy sources in any dwellings or other buildings or structures described in clause one or two of this paragraph; or
   4. (4) alterations or improvements to the exterior walls of dwellings or other buildings or structures on such property in order to comply with any provision of law regulating dwellings, buildings, or structures that are in an area designated as an historic or landmark area or that are designated as historic or landmark buildings or structures; or
   5. (5) alterations or improvements constituting a moderate rehabilitation of a substantially occupied class A multiple dwelling within a city having a population of one million or more as certified by the local housing agency pursuant to local law or rules and regulations; or
   6. (6) alterations or improvements constituting a substantial rehabilitation of a class A multiple dwelling or a conversion of a building or structure into a class A multiple dwelling as part of a program to provide housing for low and moderate income households as defined by the local housing agency pursuant to rules and regulations, provided that such alterations or improvements or conversions shall be aided by a grant, loan or subsidy from any federal, state or local agency or instrumentality, including, in the discretion of the local housing agency, a subsidy in the form of a below market sale. Such conversion, alterations or improvements shall be completed within thirty months after the date on which same shall be started except that such thirty month limitation shall not apply to conversions of residential units which are registered with the loft board in accordance with article seven-C of the multiple dwelling law pursuant to subparagraph one of this paragraph. Notwithstanding the foregoing, a sixty month period for completion shall be available for alterations or improvements undertaken by a housing development fund company organized pursuant to article eleven of the private housing finance law, which are carried out with the substantial assistance of grants, loans or subsidies from any federal, state or local governmental agency or instrumentality or which are carried out in a property transferred from such city if alterations and improvements are completed within seven years after the date of transfer. In addition, the local housing agency is hereby empowered to grant an extension of the period of completion for any project carried out with the substantial assistance of grants, loans or subsidies from any federal, state or local governmental agency or instrumentality, if such alterations or improvements are completed within sixty months from commencement of construction. Provided, further, that such conversion, alterations or improvements shall in any event be completed prior to June thirtieth, two thousand nineteen. Exemption for conversions, alterations or improvements pursuant to subparagraph one, two, three or four of this paragraph shall continue for a period not to exceed fourteen years and begin no sooner than the first quarterly tax bill immediately following the completion of such conversion, alterations or improvements. Exemption for alterations or improvements pursuant to this subparagraph or subparagraph five of this paragraph shall continue for a period not to exceed thirty-four years and shall begin no sooner than the first quarterly tax bill immediately following the completion of such alterations or improvements. Such exemption shall be equal to the increase in the valuation which is subject to exemption in full or proportionally under this subdivision for ten or thirty years, whichever is applicable. After such period of time, the amount of such exempted assessed valuation of such improvements shall be reduced by twenty percent in each succeeding year until the assessed value of the improvements are fully taxable. Provided, however, exemption for any conversion, alterations or improvements which are aided by a loan or grant under article eight, eight-A, eleven, twelve, fifteen or twenty-two of the private housing finance law, section six hundred ninety-six-a or section ninety-nine-h of the general municipal law, or section three hundred twelve of the housing act of nineteen hundred sixty-four (42 U.S.C.A. 1452b), or the Cranston-Gonzalez national affordable housing act (42 U.S.C.A. 12701 et. seq.), or started after July first, nineteen hundred eighty-three by a housing development fund company organized pursuant to article eleven of the private housing finance law which are carried out with the substantial assistance of grants, loans or subsidies from any federal, state or local governmental agency or instrumentality or which are carried out in a property transferred from any city and where alterations and improvements are completed within seven years after the date of transfer may commence at the beginning of any tax quarter subsequent to the start of such conversion, alterations or improvements and prior to the completion of such conversion, alterations or improvements.
2. (b) Any city to which the multiple dwelling law is not applicable, acting through its local legislative body or other governing agency, is hereby authorized and empowered, to and including June first, nineteen hundred seventy-two, to adopt and amend local laws or ordinances providing that any increase in assessed valuation resulting from alterations and improvements to eliminate presently existing unhealthy or dangerous conditions in any multiple dwellings occupied, as a rule, for permanent residence purposes or to replace inadequate and obsolete sanitary facilities any of which represent fire or health hazards, in such dwellings except insofar as the gross cubic content of the building is increased thereby, shall be exempt from taxation for local purposes for a period not to exceed twelve years after the taxable status date immediately following the completion thereof, provided that the alterations or improvements for which the benefits of any such law or ordinance are claimed were started after March first, nineteen hundred sixty-two, and completed within two years from the date on which they were started and in any event prior to December thirty-first, nineteen hundred seventy-four.

3. 1-a. Notwithstanding the provisions of subdivision one of this section, alterations, improvements or conversions of any building or structure that are eligible for benefits pursuant to paragraph (a) of subdivision one of this section except insofar as the gross cubic content of such building or structure is increased thereby shall be eligible for such benefits insofar as the gross cubic content of such building or structure is increased thereby provided that:

   1. (a) for all tax lots now existing or hereafter created, at least fifty percent of the floor area of the completed building or structure consists of the pre-existing building or structure that was converted, altered or improved in accordance with paragraph (a) of subdivision one of this section, and
   2. (b) for tax lots in the city of New York now existing or hereafter created within the following area in the borough of Manhattan, such conversions, alterations or improvements are aided by a grant, loan or subsidy from any federal, state or local agency or instrumentality: beginning at the intersection of the United States pierhead line in the Hudson river and the center line of Chambers street extended, thence easterly to the center line of Chambers street and continuing along the center line of Chambers street to the center line of Centre street, thence southerly along the center line of Centre street to the center line of the Brooklyn Bridge to the intersection of the Brooklyn Bridge and the United States pierhead line in the East river, thence northerly along the United States pierhead line in the East river to the intersection of the United States pierhead line in the East river and the center line of One Hundred Tenth street extended, thence westerly to the center line of One Hundred Tenth street and continuing along the center line of One Hundred Tenth street to its westerly terminus, thence westerly to the intersection of the center line of One Hundred Tenth street extended and the United States pierhead line in the Hudson river, thence southerly along the United States pierhead line in the Hudson river to the point of beginning. For purposes of this subdivision, "floor area" shall have the same meaning as in paragraph b of subdivision one of section four hundred twenty-one-a of this title. Nothing in this subdivision shall be construed to provide benefits pursuant to subdivision two of this section for the costs attributable to the increased cubic content in any such building or structure.

4. 2.

   1. (a) With respect to conversions, alterations or improvements eligible to receive the benefits of subdivision one of this section, any such local law or ordinance may also provide that the duration and amount of abatement of taxes on such property, including the land, may be separately established for each of the categories of eligibility described in paragraph a of subdivision one of this section, provided that:

      1. (1) except as provided in subparagraphs two and three of this paragraph, the annual abatement of taxes on such property, including the land, shall not be an amount greater than eight and one-third per centum of the total cost of such conversion, alterations or improvements nor shall the abatement exceed the total cost of such conversions, alterations or improvements or be effective for more than twenty years and the annual abatement of taxes in any consecutive twelve-month period shall in no event exceed the amount of taxes payable in such twelve-month period;
      2. (2) in the case of alterations or improvements (i) pursuant to subparagraph five of paragraph (a) of subdivision one of this section which are carried out with the substantial assistance of grants, loans or subsidies from any federal, state or local agency or instrumentality or any not-for-profit philanthropic organization one of whose primary purposes is providing low or moderate income housing or financed with mortgage insurance by the New York city residential mortgage insurance corporation or the state of New York mortgage agency or pursuant to a program established by the federal housing administration for rehabilitation of existing multiple dwellings in a neighborhood strategy area as defined by the United States department of housing and urban development, or (ii) pursuant to subparagraph six of paragraph (a) of subdivision one of this section the abatement of taxes on such property, including the land, shall not exceed one hundred fifty per centum of the certified reasonable cost of the alterations or improvements, as determined under regulations of the local housing agency administering the local law, and the annual abatement of taxes shall not exceed twelve and one-half per centum of such certified reasonable cost, provided that such abatement shall not be effective for more than twenty years and the annual abatement of taxes in any consecutive twelve-month period shall in no event exceed the amount of taxes payable in such twelve-month period; or
      3. (3) in the case of alterations or improvements carried out with the substantial assistance of grants, loans or subsidies from any federal, state or local agency or instrumentality or any not-for-profit philanthropic organization one of whose primary purposes is providing low or moderate income housing, or financed with mortgage insurance by the New York city residential mortgage insurance corporation or the state of New York mortgage agency or pursuant to program established by the federal housing administration for rehabilitation of existing multiple dwellings in a neighborhood strategy area as defined by the United States department of housing and urban development where such alterations or improvements are done on property located in census tracts in which seventy-five percent or more of the population live in households which earn fifty percent or less of the median household income of the city in which such census tracts are located, the abatement of taxes on such property, including the land, shall not exceed one hundred fifty per centum of the certified reasonable cost of the alterations or improvements, as determined under regulations of the local housing agency administering the local law, and the annual abatement of taxes shall not exceed twelve and one-half per centum of such certified reasonable cost, provided that such abatement shall not be effective for more than twenty years and the annual abatement of taxes in any consecutive twelve-month period shall in no event exceed the amount of taxes payable in such twelve month period.

   2. (b) Such abatement:

      1. (1) shall begin no sooner than the first quarterly tax bill immediately following the completion of such conversion, alterations or improvements, or
      2. (2) in the case of any such conversion, alterations or improvements (i) completed after December thirty-first, nineteen hundred seventy-five and aided by a loan under article eight of the private housing finance law, or (ii) started after July first, nineteen hundred seventy-seven and aided by a loan under article fifteen of the private housing finance law, or (iii) started after July first, nineteen hundred eighty and aided by a loan under article eight-A of the private housing finance law or (iv) started after July first, nineteen hundred eighty and aided by a loan under section three hundred twelve of the housing act of nineteen hundred sixty-four (42 U.S.C.A. 1452b), or (v) started after July first, nineteen hundred ninety-two and aided by a loan or grant under article eleven, twelve, or twenty-two of the private housing finance law, section six hundred ninety-six-a or section ninety-nine-h of the general municipal law, or the Cranston-Gonzalez national affordable housing act (42 U.S.C.A. 12701 et. seq.), or (vi) started after July first, nineteen hundred eighty-eight by or on behalf of a company not qualifying under any of the above provisions which is a not-for-profit corporation qualified pursuant to section 501(c)(3) of the Internal Revenue Code and which has entered into a regulatory agreement with the local housing agency requiring operation of the property as housing for low and moderate income persons and families; may be commenced at the beginning of any tax quarter subsequent to the start of such conversion, alterations or improvements and prior to the completion of such conversion, alterations or improvements.
5. 3. Any such local law or ordinance may also provide that where the improvements and alterations include or benefit that part of a building which is not occupied for dwelling purposes, the increase in assessed valuation and the cost of the alteration shall be apportioned so that the benefits of the local law or ordinance shall not be provided for improvements or alterations made for other than dwelling purposes.
6. 4. Any such local law or ordinance may also provide that its benefits shall not become available to any multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section unless and until such multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section complies with the applicable provisions of law. Any such law or ordinance may make provision as to the date as of which particular improvements and alterations shall be deemed to have been completed or commenced therefor, as the case may be, for the purpose of qualifying for the benefits thereof. Any such local law or ordinance may make provision authorizing the adoption of rules and regulations by the local agencies of government for the effectuation of the purposes of this section. Any such local law or ordinance shall provide that the benefits of this section shall apply to any multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section, which (i) is operated exclusively for the benefit of persons or families who are entitled to occupancy by reason of ownership of stock or membership in the corporate owner, or for the benefit of such persons or families and other persons or families entitled to occupancy under applicable provisions of law without ownership of stock or membership in the corporate owner, or (ii) is owned as a condominium and is occupied as the residence or home of three or more families living independently of each other; provided, however, that any such law or ordinance shall make provision, in addition to all other conditions of eligibility for the benefits of this section, except for multiple dwellings in which units have been newly created by substantial rehabilitation of vacant buildings or conversions of non-residential buildings, that the availability of benefits under this section for such multiple dwellings, buildings or structures shall be conditioned on the following: (1) any items of work designated as a major capital improvement in the rules adopted by the local housing agency or asbestos abatement to the extent such asbestos abatement is required by federal, state or local law, and (2) (i) the assessed valuation of such multiple dwelling, building, or structure, including land, shall not exceed an average of forty thousand dollars per dwelling unit at the time of the commencement of the alterations or improvements, and (ii) the average per room sale price of the dwelling units or the stock allocated to such dwelling units shall have been no greater than thirty-five percent of the maximum mortgage amount for a single family home eligible for purchase by the Federal National Mortgage Association during the three years immediately preceding the commencement of the alterations or improvements; provided that if less than ten percent of the dwelling units or an amount of stock less than the amount allocable to ten percent of such dwelling units was not transferred during such preceding three year period, eligibility for benefits shall be conditioned upon the multiple dwelling, building, or structure having an assessed valuation per dwelling unit of no more than forty thousand dollars at the time of the commencement of the alteration or improvements. Notwithstanding the foregoing, such local law shall also provide benefits under this section for work completed in any such multiple dwelling, building or structure within the first three years of its conversion to cooperative or condominium ownership, as evidenced by the date on which the first closing in a condominium to a bona fide purchaser occurs or in the case of a cooperative, the date on which the shares allocable to a unit are conveyed to a bona fide purchaser. Any such local law shall also limit the maximum amount of tax abatement which may be received in any tax period under this section by any such multiple dwelling, building or structure for any alterations and improvements commenced three years or more after its initial conversion to cooperative or condominium ownership to an amount not in excess of two thousand five hundred dollars per dwelling unit of the certified reasonable cost of the alterations or improvements as determined under regulations of the local housing agency administering the local law. Any such local law may also require such certifications and consents to access to records, including other tax records, as may be deemed appropriate to enforce such conditions of eligibility. Any such local law or ordinance shall provide that the local agencies of government shall establish maximum dollar limits for specified items of cost for any conversion, alterations or improvements. No costs in excess of such maximum dollar limits shall be considered in determining the benefits of this section.
7. 4-a. Notwithstanding any contrary provision of subdivision four of this section, any such local law or ordinance shall provide that the availability of benefits under this section to any multiple dwelling, building or structure owned and operated by a limited-profit housing company established pursuant to article two of the private housing finance law shall not be conditioned upon the assessed valuation of such multiple dwelling, building or structure, including land, as calculated as an average dollar amount per dwelling unit, at the time of the commencement of the alterations or improvements; provided, however, that such limited-profit housing company (a) is organized and operating as a mutual company, (b) continues to be organized and operating as a mutual company and to own and operate the multiple dwelling, building or structure receiving such benefits, and (c) has entered into a binding and irrevocable agreement with the commissioner of housing of the state of New York, the supervising agency, the New York city housing development corporation, or the New York state housing finance agency prohibiting the dissolution or reconstitution of such limited-profit housing company pursuant to section thirty-five of the private housing finance law for not less than fifteen years from the commencement of such benefits. For the purposes of this subdivision, the terms "mutual company" and "supervising agency" shall have the same meanings as set forth in section two of the private housing finance law. 4-a-1. Notwithstanding any contrary provision of subdivision four of this section, any such local law or ordinance shall provide that the availability of benefits under this section to any multiple dwelling, building or structure owned and operated by a redevelopment company established pursuant to article five of the private housing finance law shall not be conditioned upon the assessed valuation of such multiple dwelling, building or structure, including land, as calculated as an average dollar amount per dwelling unit, at the time of the commencement of the alterations or improvements: provided, however, that such redevelopment company (a) is organized and operating as a mutual redevelopment company, (b) continues to be organized and operating as a mutual redevelopment company and to own and operate the multiple dwelling, building or structure receiving such benefits, and (c) has entered into a binding and irrevocable agreement with the commissioner of housing and community renewal, the supervising agency, the New York city housing development corporation, or the New York state housing finance agency prohibiting the dissolution or reconstitution of such redevelopment company pursuant to section one hundred twenty-three of the private housing finance law until the earlier to occur of: (i) in fifteen years from the commencement of such benefits, or (ii) the expiration of any tax exemption granted to such redevelopment company pursuant to section one hundred twenty-five of the private housing finance law. For the purposes of this subdivision, the terms "mutual" and "supervising agency" shall have the same meanings as set forth in section one hundred two of the private housing finance law.
8. 4-b. Notwithstanding any contrary provision of the private housing finance law, any such local law shall provide that the benefits of this section shall apply to any limited profit housing company as provided in this section. In addition to the limitations set forth in subdivision eleven of this section, such multiple dwelling, building or structure shall be eligible for benefits only where at least one building wide improvement or alteration is part of the application for benefits. Furthermore, to the extent that such alterations or improvements are financed with grants, loans or subsidies from any federal, state, or local agency or instrumentality, such multiple dwelling, building or structure shall be eligible for benefits only if the limited profit housing company has entered into a binding and irrevocable agreement with the commissioner of housing of the state of New York, the supervising agency, as such term is defined in section two of the private housing finance law, the New York city housing development corporation, or the New York state housing finance agency prohibiting the dissolution or reconstitution of such limited profit housing company pursuant to section thirty-five of the private housing finance law for not less than fifteen years from the commencement of such benefits. The abatement of taxes on such property, including the land, shall not be an amount greater than ninety per centum of the certified reasonable cost of such alterations or improvements, as determined under regulations of the local housing agency administering the local law, nor greater than eight and one-third percent of such certified reasonable cost in any twelve month period, nor be effective for more than twenty years. The annual abatement of taxes in any twelve month period shall in no event exceed fifty percent of the amount of taxes payable in such twelve month period pursuant to the applicable exemption granted pursuant to article two of the private housing finance law or other applicable laws or fifty percent of payments made in lieu of taxes in such twelve month period.

9. 4-c.

   1. (a) Any such local law may also provide that a group of multiple dwellings which was developed as a planned community and which is owned as two separate condominiums containing a total of ten thousand or more dwelling units shall be eligible for tax exemption and abatement as provided in this subdivision.
   2. (b) Any increase in assessed valuation resulting from alterations or improvements to one or more multiple dwellings in a planned community described in paragraph (a) of this subdivision shall be exempt from taxation for local purposes. Such exemption shall be equal to the increase in the valuation which is subject to exemption under this paragraph for thirty years. After such period of time, the amount of such exempted assessed value shall be reduced by twenty percent in each succeeding year until the assessed value of the alterations or improvements is fully taxable. Such exemption may commence at the beginning of any tax quarter subsequent to the start of such alterations or improvements. In no event shall such alterations or improvements directly or indirectly result in an equalization increase in the assessed valuation of any multiple dwelling forming part of the planned community where such alterations or improvements are performed.
   3. (c) The abatement of taxes on a planned community described in paragraph (a) of this subdivision, including the land, shall not exceed the greater of (i) one hundred fifty per centum of the certified reasonable cost of the alterations or improvements, as determined under the regulations of the local housing agency administering the local law, and (ii) the construction cost of the alterations or improvements identified in such regulations. Such abatement shall not be effective for more than twenty years and the annual abatement of taxes in any consecutive twelve-month period shall not be greater than ten per centum of the total abatement granted and shall not exceed the amount of taxes payable in such consecutive twelve-month period. Such abatement shall begin no sooner than the first quarterly tax bill immediately following the completion of such alterations or improvements. The limitations set forth in subdivision four of this section for multiple dwellings, buildings and structures owned as condominiums shall be inapplicable to benefits granted pursuant to this subdivision. Abatement benefits granted pursuant to this subdivision shall be apportioned among all of the condominium tax lots within the condominium in which the alterations or improvements are made, although such alterations or improvements may have been made to one or fewer than all of the multiple dwellings therein.
   4. (d) In the event that multiple alterations or improvements are undertaken in a planned community described in paragraph (a) of this subdivision and separate applications for benefits therefor are made, all requirements concerning physical condition of and compliance with law by the multiple dwellings in such planned community shall apply only upon completion of all such alterations or improvements, provided that all such alterations or improvements are completed within six years.
   5. (e) Except as provided in this subdivision, all of the requirements imposed by this section on projects described in paragraph (a) of subdivision one of this section shall be applicable to alterations or improvements granted benefits pursuant to this subdivision.
   6. (f) This subdivision shall be applicable only to alterations or improvements completed prior to December thirty-first, two thousand five.
10. 5. To the end that conversions, alterations, and improvements aided by this section shall interfere as little as practicable with urgently needed public improvements or the clearance, rehabilitation, or rebuilding of substandard and unsanitary areas, and shall be confined to multiple dwellings, buildings or structures as provided in paragraph (a) of subdivision one of this section which are structurally sound, such local law or ordinance may provide that exemption or abatement from taxation hereunder shall be restricted to multiple dwellings, buildings or structures as provided in paragraph (a) of subdivision one of this section (a) which the local planning commission in any such city shall certify will not interfere with projected public improvements or the clearance and rebuilding of substandard and insanitary areas, and (b) which the local building department certifies to be structurally sound and (c) which, if in an area approved for clearance, replanning, reconstruction or neighborhood rehabilitation pursuant to chapter eight hundred eighty-seven of the laws of nineteen hundred forty-five, as from time to time amended, or if in an area designated for studies, tests, demonstrations and other activities for the prevention and elimination of slums and urban blight pursuant to chapter six hundred eight of the laws of nineteen hundred fifty-six as from time to time amended, or if in an area for which a preliminary or final plan has been approved pursuant to chapters six hundred eighty-eight of the laws of nineteen hundred fifty-seven or nine hundred twenty-four of the laws of nineteen hundred fifty-eight, as from time to time amended, or chapter nine hundred seventy-one of the laws of nineteen hundred sixty, or if in an area for which an urban renewal plan or tests, studies or demonstrations have been approved pursuant to article fifteen of the general municipal law, is certified by the project board for the area as a dwelling which is to be or has been improved in conformity with such replanning, reconstruction, neighborhood improvement, studies, tests, demonstrations or plan.
11. 6. Notwithstanding the provisions of the multiple dwelling law, multiple residence law, and any local law, ordinance, rule or regulation, any city to which this section is applicable acting through its local legislative body may provide, in a manner that shall be uniform as to any particular type or class of multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section, that, any multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section to which alterations and improvements are made pursuant to this section and which did not require a certificate of occupancy on April second, nineteen hundred forty-five, and, in the case of multiple dwellings, buildings or structures as provided in paragraph (a) of subdivision one of this section to which the multiple residence law is applicable, on July first, nineteen hundred fifty-two, may not be occupied lawfully after such date upon the completion of such alterations and improvements without a certificate of occupancy.

12. 7. Any local law or ordinance may also provide any or all of the following:

    1. (a) The benefits of this section shall not apply to any multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section in which rents, subsequent to alterations and improvements, shall exceed such amount, if any, as may be fixed by the local legislative body or by the municipal agency designated by the local legislative body of the municipality involved, based upon a standard formula.

    2. (b)

       1. (1) The benefits of this section shall not apply to any multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section which is not subject to the provisions of the emergency housing rent control law or to local law enacted pursuant to the local emergency housing rent control act, where the local legislative body or other governing agency of the municipality involved shall prescribe that the benefits herein provided shall not apply to such multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section provided that such local legislative body or other governing agency shall not use the authority conferred in this paragraph (b) to rescind any benefits granted under former section five-h of the tax law prior to July first, nineteen hundred fifty-eight; and further provided that where the benefits provided herein or under such former section five-h of the tax law are granted or had been granted on or after July first, nineteen hundred fifty-eight, to any multiple dwelling, building or structure which is decontrolled subsequent to the granting of such benefits, the local legislative body or other governing agency may withdraw such benefits from such dwelling.
       2. (2) Any dwelling unit subject to rent regulation on or before the effective date of this subparagraph as a result of receiving a tax exemption or abatement pursuant to this section shall be subject to such regulation until the occurrence of the first vacancy of such unit after such benefits are no longer being received at which time such unit shall be deregulated or if each lease and renewal thereof for such unit for the tenant in residence at the time of the expiration of the tax benefit period has included a notice in at least twelve point type informing such tenant that the unit shall become subject to deregulation upon the expiration of such tax benefit period and states the approximate date on which such tax benefit period is scheduled to expire, such dwelling unit shall be deregulated as of the end of the tax benefit period; unless such unit would have been subject to regulation under the rent stabilization law of nineteen hundred sixty-nine or the emergency tenant protection act of nineteen seventy-four.
    3. (c) The benefits of this section shall apply to any multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section occupied, as a rule, for permanent residence purposes and which is not used in whole or in part for single room occupancy and which is not subject to the provisions of the emergency housing rent control law or to local law enacted pursuant to the local emergency housing rent control act, provided that it is located within an area which has been designated by the local planning commission under the provisions of section seventy-two-m of article fifteen of the general municipal law or where a program of local neighborhood improvement or housing maintenance is being carried out under the supervision or with the assistance of the local government and provided that the rents or carrying charges, subsequent to alterations and improvements, (1) shall not exceed such amount, if any, as may be fixed by the local legislative body or by the municipal agency designated by the local legislative body of the municipality involved, based upon a standard formula, or (2) where the local legislative body so provides, shall not exceed such amount, if any, as may be fixed for such multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section pursuant to any local law enacted pursuant to the local emergency housing rent control act, and further provided that prior to such alterations and improvements, the multiple dwelling, building or structure as provided in paragraph (a) of subdivision one of this section, if a multiple dwelling, was either a multiple dwelling occupied, as a rule, as a temporary or transient residence or occupied, as a rule, for permanent residence purposes and used in whole or in part for single room occupancy.
    4. (d) The benefits of this section shall apply to any building or structure as provided in paragraph (a) of subdivision one of this section, provided that the rents or carrying charges subsequent to conversion (1) shall not exceed such amount, if any, as may be fixed by the local legislative body or by the municipal agency designated by the local legislative body of the municipality involved, based upon a standard formula, or (2) where the local legislative body so provides, shall not exceed such amount, if any, as may be fixed for such dwelling pursuant to any local law enacted pursuant to the local emergency housing rent control act.
13. 8. Notwithstanding any other provision of this section the benefits of this section shall not apply to any private dwelling unless it is in an area defined by clause (c) of subdivision five of this section and is certified by the project board for the area as a dwelling which is to be or has been improved in conformity with such replanning, reconstruction, neighborhood improvement, studies, tests, demonstrations or plan. Notwithstanding the foregoing, for purposes of this section and any local law enacted pursuant hereto a class A multiple dwelling may be deemed to include any garden-type maisonette dwelling project consisting of a series of dwelling units which together and in their aggregate were arranged or designed to provide three or more apartments and are provided as a group collectively with all essential services such as, but not limited to, water supply, house sewers and heat, and which are in existence and operated as a unit under single ownership on the date upon which an application for the benefits of this section is received by the city, even though certificates of occupancy were issued for portions thereof as private dwellings.
14. 8-a. Notwithstanding the provisions of subdivision eight of this section to the contrary, unless excluded by local law, the benefits of this section may apply to: (i) alterations or improvements to any private dwelling; (ii) conversion of any private dwelling to a multiple dwelling; or (iii) conversion of any multiple dwelling to a private dwelling, provided that such alterations, improvements or conversion are part of a project which has applied for or is receiving benefits pursuant to this section and shall be aided by a grant loan, or subsidy from any federal, state, or local agency or instrumentality.

15. 9.

    1. (a) During the period of such exemptions the assessment on any such land and dwelling after such alterations and improvements, exclusive of the increase in valuation which is subject to exemption in full or proportionally under subdivision one of this section, shall not exceed the valuation of the previously existing dwelling appearing on the assessment rolls after the taxable status date immediately preceding the commencement of such alterations and improvements plus the value of the land, any improvements other than those made under the provisions of this section and the proportion of increased assessed valuation that is not exempt from taxation under this section, which proportion shall remain constant during the term of the exemption. Where the alteration or improvement qualifies under subparagraph two of paragraph (a) of subdivision two of this section or under clause (A) or (B) of subparagraph one of paragraph (a) of subdivision eleven of this section, the exemption shall also include an exemption from taxation for local purposes for twelve years upon that portion of the assessment, if any, which exceeds the transition assessment, as defined in subdivision two of section eighteen hundred five of this chapter, in effect at the time of the commencement of the exemption hereunder.

    2. (b) Notwithstanding the provisions of paragraph (a) of this subdivision, except as provided in subparagraph three of this paragraph, for buildings in which alterations, improvements or conversions qualifying for an exemption under this section are commenced on or after the date on which this paragraph becomes a law:

       1. (1) The assessed value of the building during the period of the exemption shall be pro-rated between the exempt and taxable portions of the building assessment so that throughout the exemption period the exempt portion of the building assessment shall bear the same relationship to the non-exempt portion of the building assessment as it did on the final tax roll on which an exemption was first available to such building for alterations or improvements made pursuant to this section or on the last tax roll on which such ratio was changed by reason of additional improvements, whichever results in the greatest percentage of exempt assessed valuation; provided, however, that increases in building value due to (i) additional improvements that do not qualify for an exemption under this section, (ii) increases in the value of non-residential portions of the building, or (iii) non-exempt additions to cubic content shall not be pro-rated, but shall be fully taxable.
       2. (2) Reductions in the assessed value of the building during the period of the exemption shall be pro-rated between the taxable and exempt portions of the building assessment in the proportion which was established pursuant to subparagraph one of this paragraph on the final tax roll for the first fiscal year for which an exemption was granted pursuant to this section, or on the last tax roll on which such ratio was changed by reason of additional improvements, whether exempt or non-exempt, or due to changes in the assessed value of fully taxable space. In no case, however, shall the value of an exemption granted pursuant to this section be reduced during the period for which such exemption was granted, by reason of a reduction in the assessed value of the building, to an amount less than the amount of exemption appearing on the first tax roll following the grant of this exemption.
       3. (3) During the first three years of such exemptions, the assessment on any such land and dwelling shall be determined in accordance with paragraph (a) of this subdivision.

16. 10. In cities with a population of one million or more, any such local law or ordinance may require that, prior to application for any tax exemption or abatement pursuant to this section, relocation awards be paid to certain displaced manufacturing and other tenants under the terms and conditions set forth below:

    1. (a) Relocation awards for certain tenants of non-residential buildings. Such local law or ordinance shall limit eligibility for such a relocation award to former tenants and former subtenants of premises in a non-residential building which is the subject of an application for an alteration permit for conversion to a class A multiple dwelling, who:

       1. (1) leased and used the vacated premises to conduct a manufacturing, warehousing, or wholesaling business for not less than two consecutive years immediately prior to vacating;
       2. (2) vacated such premises on or after April first, nineteen hundred eighty-one for any reason other than eviction for non-payment of rent;
       3. (3) vacated such premises (i) no earlier than twenty-four months prior to the filing date of an application for such alteration permit and (ii) no later than the completion of the conversion as evidenced by the issuance of a permanent certificate of occupancy for a class A multiple dwelling;
       4. (4) either purchased or leased for a term of not less than eighteen months other premises within such city with a floor area not less than one-third of the floor area of the vacated premises;
       5. (5) relocated their business to such other premises within one year of vacating the vacated premises; and
       6. (6) paid all commercial rent or occupancy tax for the vacated premises. A subtenant shall be eligible to receive a relocation award notwithstanding any lack of eligibility of its prime tenant.
    2. (b) Amount of relocation award. The relocation award shall not exceed the greater of (1) all the base rent that accrued and was paid by the eligible tenant during the final twenty-four months of its occupancy of the vacated premises or (2) four dollars for each square foot that the eligible tenant occupied in the vacated premises during the final twenty-four months of its occupancy of the vacated premises. As used in this subdivision, base rent shall be calculated in the same manner as base rent is calculated for purposes of commercial rent or occupancy tax in the city of New York, or in any such city. However, the aggregate award payable to a prime tenant and any subtenants of such prime tenant shall not exceed the amount which would have been payable to the prime tenant had the prime tenant been eligible for an award based on the entire floor area it leased from the owner; and if such limitation applies, the awards shall be prorated based upon the total floor area used and occupied by each eligible tenant.
    3. (c) Payment of award. The relocation award shall become due and payable to an eligible tenant at the time the eligible tenant either purchases or leases other premises in accordance with paragraph (a) above within such city and certifies eligibility to and demands payment of the award from the owner of the vacated building. If the relocation award is not paid within thirty days of such certification and demand, interest shall accrue on the relocation award from the date of certification and demand at the rate of twenty-four percent per annum.
    4. (d) Notice of claim. At any time after such certification and demand and prior to the date of the filing of an application for tax exemption or abatement for the vacated building pursuant to this section, an eligible tenant who has not received a relocation award shall have a right to file a notice of claim. Such notice of claim shall be filed with the county clerk of the county in which the vacated building is located and shall verify the claimant's name, its compliance with eligibility requirements, the address of the vacated premises, the floor area it occupied, the name of the prime tenant if the claimant is a subtenant, and all the base rent that accrued and was paid by the claimant during the final twenty-four months of its occupancy.
    5. (e) Discharge of notice of claim. A notice of claim may be discharged by filing an undertaking with the clerk of the county in which the premises are located in an amount equal to the amount claimed in accordance with the procedures set forth in subdivision four of section nineteen of the lien law, or by payment into court of such amount in accordance with the procedures set forth in section fifty-five of the lien law.

    6. (f) Affidavit and notice as a condition to tax benefits. No tax exemption or abatement shall be granted pursuant to this section unless the local municipal agency responsible for administering this section receives an affidavit from the applicant which verifies that:

       1. (1) the applicant has caused to be published a notice in a newspaper of general circulation within the city, no later than sixty days prior to filing of an application for tax exemption or abatement pursuant to this section, which advises former tenants and subtenants of their rights pursuant to any local law or ordinance enacted pursuant to this subdivision; and
       2. (2) no notice of claim has been filed or all claims have been released by the claimant, secured in accordance with the provisions of paragraph (e) of this subdivision, or discharged as an improper claim by a court order.
    7. (g) Action on claim. If an eligible tenant or subtenant has duly filed a notice of claim pursuant to this subdivision and does not receive a relocation award as provided herein, it may commence an action against any applicant who filed a false affidavit pursuant to paragraph (f) of this subdivision within three years of such filing or any security posted by such applicant pursuant to paragraph (e) of this subdivision. In any action to enforce a claim pursuant to this subdivision, if the court finds that the claimant has wilfully exaggerated the amount of the claim, the claimant may be held liable in damages for an amount not to exceed the proper relocation award. An eligible tenant in whose favor a judgment is entered shall be entitled to costs and reasonable legal fees and disbursements provided that such judgment is in excess of the amount which the applicant or owner offered to pay the eligible tenant.
    8. (h) Waiver. Any lease provision exempting, releasing or discharging the obligation to pay a relocation award pursuant to this subdivision shall be deemed to be void as against public policy and wholly unenforceable.
    9. (i) Local zoning resolution. The provisions of this subdivision ten shall not apply if the local zoning resolution expressly provides for relocation loans and/or grants in lieu of the benefits of this subdivision.

17. 11. Limitations of benefits. (a) Applicability. The provisions of this subdivision apply to all conversions, alterations and improvements under this section. However, they shall not apply to:

    1. (1) alterations or improvements under subparagraph two, three or four of paragraph (a) of subdivision one of this section, where carried out:

       1. (A) with the substantial assistance of grants, loans or subsidies from any federal, state or local agency or instrumentality, or any not-for-profit philanthropic organization one of whose primary purposes is providing low or moderate income housing; or
       2. (B) with mortgage insurance by the New York city residential mortgage insurance corporation or the state of New York mortgage agency; or
       3. (C) in a neighborhood preservation area, as such areas were designated by the New York city planning commission as of June first, nineteen hundred eighty-three, provided that such area or part of such area wherein the property is located has been approved as provided herein by the city council of the city of New York. No such area or part thereof shall be approved by the city council until notice of the area or part thereof proposed to be approved is submitted to every community board with jurisdiction over the area or part thereof, and (i) every such community board has made and submitted to the city council comments as to the proposed approval, or (ii) forty-five days have elapsed since such notice was submitted to such community boards, whichever is earlier; and
       4. (D) pursuant to a program established by the federal housing administration, federal national mortgage association, federal home loan mortgage corporation or government national mortgage association for the rehabilitation of existing multiple dwellings for persons of low or moderate income, or a program of mortgage insurance for the rehabilitation of existing multiple dwellings pursuant to section two hundred twenty-three-f of the national housing act as amended, or a program of mortgage insurance established by the federal housing administration for the rehabilitation of existing multiple dwellings for persons of low or moderate income; provided that properties receiving benefits under such programs are located in a neighborhood strategy area, as defined, by the United States department of housing and urban development, or a neighborhood preservation area, as such areas were designated by the New York city planning commission, as of June first, nineteen hundred eighty-three.
    2. (2) alterations or improvements under subparagraphs five and six of paragraph (a) of subdivision one of this section; or
    3. (2-a) Conversion of buildings or structures to class A multiple dwellings pursuant to subparagraph one of paragraph (a) of subdivision one of this section, where such conversions are undertaken by a not-for-profit philanthropic organization or undertaken on properties which receive mortgage insurance from the New York city residential mortgage insurance corporation, or state of New York mortgage agency, provided that such property is (i) located in a neighborhood preservation area as such areas were designated by the city planning commission on June first, nineteen hundred eighty-three, and (ii) such property has been vacant since January first, nineteen hundred eighty-two, and (iii) prior to becoming vacant such property was last utilized for governmental, educational, hospital or nursing home purposes.
    4. (3) conversions of residential units qualified for the protection of article seven-C of the multiple dwelling law under subparagraph one of paragraph (a) of subdivision one of this section.

    5. (b) Abatement limitations. The amount of abatement under subdivision two of this section shall not exceed the certified reasonable cost of the conversion, alteration or improvement, as determined under regulations of the local housing agency administering the local law, provided that the amount of certified reasonable cost eligible for abatement under this section shall not exceed fifteen thousand dollars for a dwelling unit of three and one-half rooms and a comparable amount for dwelling units of other sizes, under regulations of the local housing agency, and further provided that the amount of certified reasonable cost eligible for abatement under this section may exceed fifteen thousand dollars or such comparable amount per dwelling unit, but not more than twenty-five percent above such amount, upon application of the property owner and a determination by the housing agency that:

       1. (1) in the case of a conversion under subparagraph one of paragraph (a) of subdivision one of this section, the increased cost is necessary to comply with applicable law; or
       2. (2) in the case of an alteration or improvement under subparagraph two of paragraph (a) of subdivision one of this section, the increased cost is necessary to eliminate the unhealthy or dangerous conditions or replace the inadequate and obsolete facilities in a satisfactory manner; or
       3. (3) in the case of an alteration or improvement under subparagraph three of paragraph (a) of subdivision one of this section, the increased cost is necessary to conserve energy in a satisfactory manner; or
       4. (4) in the case of an alteration or improvement under subparagraph four of paragraph (a) of subdivision one of this section, the increased cost, to the extent such cost is not offset by any and all tax credits received as a result of the alteration or improvement, is necessary to comply with any provision of law regulating historic or landmark buildings or structures.
       5. (b-1) For the purpose of the abatement limitations contained in the opening paragraph of paragraph (b) of this subdivision, the number of rooms in a dwelling unit shall be calculated in the following manner: Each dwelling unit with at least one room which either (1) contains no cooking facilities and measures at least one hundred fifty square feet, or (2) contains cooking facilities and measures at least two hundred thirty square feet, shall count as two and one-half rooms. Every other room in the dwelling unit separated by either walls or doors, including bedrooms, shall count as an additional room, provided, however, that kitchens, cooking facilities, bathrooms, corridors or balconies shall not count as an additional room. To be included, a room must meet the requirements of habitability as provided in the relevant housing maintenance code.
       6. (c) Exemption limitations. (1) The increase in assessed valuation of the real property located in the borough of Manhattan south of or adjacent to the south side of one hundred tenth street resulting from the conversion, alteration or improvement under paragraph (a) of subdivision one of this section, shall be exempt from taxation as provided in this section, only to the extent provided in this subparagraph. The amount of the increased assessed valuation that is exempt from taxation shall depend on the amount of the total assessed valuation per dwelling unit calculated by dividing the amount of the total assessed valuation of the property, as determined under this chapter, by the number of dwelling units in the building after completion of the conversion, alteration or improvement. The amount of increased assessed valuation that will be exempt from taxation for buildings with total assessed valuation per dwelling unit of less than thirty-eight thousand dollars shall be calculated pursuant to the following formula: (A) any portion of total assessed valuation of the property attributable to the first eighteen thousand dollars of total assessed valuation per dwelling unit, to the extent it represents increased assessed valuation, shall be one hundred percent exempt; (B) any portion of total assessed valuation attributable to the next four thousand dollars of total assessed valuation per dwelling unit, to the extent it represents increased assessed valuation, shall be seventy-five percent exempt; (C) any portion of total assessed valuation attributable to the next four thousand dollars of total assessed valuation per dwelling unit, to the extent it represents increased assessed valuation, shall be fifty percent exempt; (D) any portion of total assessed valuation attributable to the next four thousand dollars of total assessed valuation per dwelling unit, to the extent it represents increased assessed valuation, shall be twenty-five percent exempt; (E) any portion of total assessed valuation attributable to the next eight thousand dollars of total assessed valuation per dwelling unit, to the extent it represents increased assessed valuation per dwelling unit, shall be fully taxable. Property with a total assessed valuation per dwelling unit of thirty-eight thousand dollars or more shall not be eligible for a tax exemption under this section.
       7. (2) In calculating the amount of increased assessed valuation that will be exempt from taxation pursuant to the formula in subparagraph one of this paragraph, the full amount of total assessed valuation that does not represent increased assessed valuation shall be applied in such formula prior to the inclusion of any amount of increased assessed valuation.
       8. (3) Where the real property is occupied in part for residential purposes and in part for non-residential purposes, the assessed valuation of the property shall be appropriately allocated between the residential and non-residential portions. In computing the total assessed valuation per dwelling unit under this paragraph, only the amount of valuation so allocated to the residential portion shall be considered.
       9. (4) Commencing with the assessment roll for the year nineteen hundred eighty-four, where there has been a change in the level of assessment from the assessment roll of the prior year of properties receiving exemptions under this section, the local agency responsible for assessment of real property may petition the commissioner to certify the percentage of such change for the purposes of this section. In such petition, the local agency shall submit such information as the commissioner shall require in order to certify the percentage of such change. The commissioner may also make such a certification on its own motion. Upon receipt of such certification from the commissioner, the local housing agency may modify the dollar values of total assessed valuation per dwelling unit in subparagraph one of this paragraph to reflect the percentage change in the level of assessment as shown in such certification. As used in this subparagraph, the term "change in the level of assessment" means the net increase or decrease in the assessed valuation of properties in the assessing unit that received exemptions under this section in the current year as compared to those that received exemptions under this section in the prior year as a result of assessing such properties at a higher or lower ratio of full value.

       10. (5)

           1. (A) Notwithstanding the provisions of subparagraph one of this paragraph, the local housing agency may reduce or remove the limitations on the exemption from taxation provided in such subparagraph with respect to a particular property undergoing alteration or improvement, upon application of the property owner and a determination by the agency that:
           2. (i) The increased benefit will increase the number of dwelling units or improve the quality of dwelling units that will be affordable to persons of low or moderate income; and
           3. (ii) The increased benefit is necessary to make economically viable the increase in the number of dwelling units or improvement in the quality of dwelling units that will be affordable to persons of low or moderate income.
           4. (B) As used in this subparagraph, the term persons of low or moderate income shall be persons who would qualify for housing subsidies pursuant to section two hundred thirty-five of the national housing act, as amended, at one hundred thirty-five percent of the income limitations provided herein.
           5. (C) Upon receiving an application under this subparagraph in proper form, the local housing agency shall immediately submit it to the community board for the area in which the project is located, which may, within forty-five days of receiving it and after a public hearing, make recommendations to the agency as to the application. The agency shall act on the application within sixty days of receiving it from the property owner in proper form, but not before expiration of the time for the community board to make its recommendations, unless the board has acted sooner.
           6. (d) The local housing agency may set forth preliminarily the terms of a determination under paragraph (b) or (c) of this subdivision prior to the commencement of the conversion, alteration or improvement. Any such determination shall take effect after completion of the work.
           7. (e) Publication of local housing agency determinations. Any determination of the local housing agency to increase an abatement under paragraph (b) of this subdivision or to reduce or remove the exemption limitations under paragraph (c) of this subdivision shall state the basis for the determination and the data on which the determination was based. Such determination shall be published in the official publication of the city, or if no such publication exists in a newspaper with general circulation in the city, for five consecutive days after the determination is rendered.
           8. (f) Proration of assessed valuation. Notwithstanding the provisions of paragraph (b) of subdivision nine of this section, the provisions of this paragraph shall apply to changes in assessments resulting from conversion, alterations or improvements which are not subject to the abatement or exemption limitations of paragraphs (b) and (c) of this subdivision. During the period of such exemptions the assessment on any such land and dwelling after such alterations and improvements, exclusive of the increase in valuation which is subject to exemption in full or proportionally under subdivision one of this section, shall not exceed the valuation of the previously existing dwelling appearing on the assessment rolls after the taxable status date immediately preceding the commencement of such alterations and improvements plus the value of the land, any improvements other than those made under the provisions of this section and the proportion of increased assessed valuation that is not exempt from taxation under this section, which proportion shall remain constant during the term of the exemption. Where the alteration or improvement qualified under subparagraph two of paragraph (a) of subdivision two of this section or under clause (A) or (B) of subparagraph one of paragraph (a) of this subdivision, the exemption shall also include an exemption from taxation for local purposes for twelve years upon that portion of the assessment, if any, which exceeds the transition assessment, as defined in subdivision two of section eighteen hundred five of this chapter, in effect at the time of commencement of the exemption hereunder.

18. 12. Harassment. (a) The provisions of this subdivision apply to and are additional requirements for claiming or receiving:

    1. (1) any tax exemption under this section; or
    2. (2) any tax abatement under this section where the certified reasonable cost per dwelling unit of the conversion, alteration or improvement (including the cost of any conversion, alteration or improvement for which an abatement was approved within four years prior to commencement of the conversion, alteration or improvement) exceeds seven thousand five hundred dollars.

    3. (b) The owner of the property shall, not less than thirty days before the commencement of the conversion, alteration or improvement (hereinafter referred to as the "cut-off date"), file with the local housing agency administering the local law, an affidavit or, where any information referred to in subparagraph one of this paragraph changes prior to applying for or claiming any benefit under this section, an amending affidavit, setting forth the following information:

       1. (1) every owner of record and owner of a substantial interest in the property or entity owning the property or sponsoring the conversion, alteration or improvement;
       2. (2) a statement that none of such persons had, within the five years prior to the cut-off date, been found to have harassed or unlawfully evicted tenants by judgment or determination of a court or agency (including a non-governmental agency having appropriate legal jurisdiction) under the penal law, any state or local law regulating rents or any state or local law relating to harassment of tenants or unlawful eviction; and
       3. (3) any change in the information required to be set forth.

    4. (c) No conversion, alteration or improvement subject to this subdivision shall be eligible for tax exemption or tax abatement under this section where:

       1. (1) any affidavit required under this subdivision has not been filed; or
       2. (2) any such affidavit contains a willful misrepresentation or omission of any material fact; or
       3. (3) any person referred to in subparagraph one of paragraph (b) of this subdivision has been found to have harassed or unlawfully evicted tenants as described in that paragraph, until and unless the finding is reversed on appeal, provided that any such finding after the cut-off date shall not apply to or affect any tax abatement or exemption for the conversion, alteration or improvement covered by the affidavit.
    5. (d) The local housing agency administering this law and the local government agency responsible for real property tax assessment shall maintain a list of affidavits as described in paragraph (b) of this subdivision. Each agency shall review that list with respect to each application or claim for benefits subject to this subdivision.
    6. (e) "Substantial interest" as used in subparagraph one of paragraph (b) of this subdivision shall mean ownership of an interest of ten per centum or more in the property or entity owning the property or sponsoring the conversion, alteration or improvement.
    7. (f) Where the conversion, alteration or improvement is commenced before August first, nineteen hundred eighty-three, the cut-off date shall be as set forth in this subdivision, but no affidavit shall be required to be filed until thirty days after the effective date of this subdivision.
19. 13. Additional limitation. The benefits of this section shall not apply to any conversion of or alteration or improvement to any class B multiple dwelling or class A multiple dwelling used in whole or in part for single room occupancy, regardless of the status or use of the building after the conversion, alteration or improvement unless such conversion, alteration or improvement is carried out with the substantial assistance of grants, loans or subsidies from any federal, state or local agency or instrumentality.
20. 14. Conversion of properties to residential use. The benefits of this section shall not apply to any conversion of property to residential use where the conversion was contrary to the applicable zoning resolution and was permitted only by virtue of a variance as to use, unless the local law is amended to explicitly provide that benefits shall be available in such cases. The provisions of this subdivision do not apply to conversions of residential units qualified for the protection of article seven-C of the multiple dwelling law under subparagraph one of paragraph (a) of subdivision one of this section.
21. 15. Authority of city to limit local law. Where a city enacts or amends a local law under this section, the local law may restrict, limit or condition the eligibility, scope or amount of the benefits under the local law in any manner, provided that the local law may not grant benefits beyond those provided in this section.
22. 16. Institutional lenders; cost certification. The rules of the local housing agency administering such local law or ordinance shall make provision for circumstances in which an institutional mortgage lender (as defined in such rules) which has provided financing for alterations or improvements to a building or structure and has become a successor in interest (as defined in such rules) to the original owner of such building or structure, after diligent efforts to obtain original contracts, checks and other records normally reviewed by such agency to verify claimed costs, is unable to obtain part or all of such records. Under such circumstances the rules shall permit substitution in whole or in part, as the case may be, of documentation certified by the lender showing the amounts advanced by the lender pursuant to the mortgage loan to finance such alterations or improvements, along with such other documentation as the agency may require.

23. 17.

    1. (a) For purposes of this subdivision, "substantial governmental assistance" shall mean:

       1. (i) grants, loans or subsidies from any federal, state or local agency or instrumentality in furtherance of a program for the development of affordable housing approved by the local housing agency, including, without limitation, financing or insurance provided by the state of New York mortgage agency of the New York city residential mortgage insurance corporation; or
       2. (ii) a written agreement between a housing development fund corporation and the local housing agency limiting the incomes of persons entitled to purchase shares or rent housing accommodations therein.

    2. (b) Any local law or ordinance providing for benefits pursuant to this section must also provide the following with respect to conversions, alterations or improvements completed on or after December thirty-first, two thousand eleven:

       1. (i) except as otherwise provided in this section with respect to multiple dwellings, buildings and structures owned and operated either by limited-profit housing companies established pursuant to article two of the private housing finance law or redevelopment companies established pursuant to article five of the private housing finance law, or with respect to a group of multiple dwellings that was developed as a planned community and that is owned as two separate condominiums containing a total of ten thousand or more dwelling units, any multiple dwelling, building or structure that is owned as a cooperative or a condominium that has an average assessed value per dwelling unit that exceeds the assessed valuation limitation as provided in paragraph (c) of this subdivision shall only be eligible for such benefits if the alterations or improvements for which such multiple dwelling, building or structure has applied for the benefits pursuant to this section were carried out with substantial governmental assistance; and
       2. (ii) no benefits pursuant to this section shall be granted for the conversion of any non-residential building or structure into a class A multiple dwelling unless such conversion was carried out with substantial governmental assistance.
    3. (c) Assessed value limitation. (i) For final assessment rolls to be completed prior to two thousand seventeen, the assessed value limitation shall be thirty thousand dollars.
    4. (ii) For the final assessment roll to be completed in two thousand seventeen the assessed value limitation shall be thirty-two thousand dollars increased by the cost-of-living adjustment percentage of two thousand seventeen. For the purposes of this computation, the cost-of-living adjustment percentage of two thousand seventeen shall be equal to the "applicable increase percentage" used by the United States commissioner of social security to determine the monthly social security benefits payable in two thousand seventeen to individuals, as provided by subsection (i) of section four hundred fifteen of title forty-two of the United States code.
    5. (iii) For final assessment rolls to be completed in each ensuing year, the applicable assessed value limitation, cost-of-living adjustment percentage and applicable increase percentage shall all be advanced by one year, and the assessed valuation limitation shall be the previously applicable assessed value limitation increased by the new cost-of-living adjustment percentage. If there should be a year for which there is no applicable increase percentage due to a general benefit increase as defined by subdivision three of subsection (i) of section four hundred fifteen of title forty-two of the United States code, the applicable increase percentage for purposes of this computation shall be deemed to be the percentage which would have yielded that general benefit increase.
    6. (iv) Notwithstanding anything to the contrary contained herein, the assessed value limitation shall not at any time exceed thirty-five thousand dollars.
24. 18. Any local law or ordinance providing for benefits pursuant to this section must also provide, with respect to conversions, alterations or improvements for which application was made after the effective date of this subdivision, that if such conversions, alterations or improvements are not completed on the date upon which such local housing agency inspects the items of work claimed in such application, the local housing agency shall require the applicant to pay two times the actual cost for any additional inspections needed to verify the completion of such conversion, alteration or improvement.
25. 19. The revocation of benefits granted to any multiple dwelling, building or structure pursuant to this section shall not exempt any dwelling unit therein from continued compliance with the requirements of this section or of any local law or ordinance providing for benefits pursuant to this section.
26. 20. Notwithstanding the provisions of any general, special or local law or any local ordinance providing for benefits pursuant to this section the department may require that the applications for exemption or abatement under this section that are filed on or after a date specified in such local law or ordinance be filed electronically.